PEM electrolytic bath with heat dissipation function

By setting up a heat dissipation runner and cooling water circulation system in the PEM electrolytic cell, the problem of heat loss during the electrolysis process is solved, and efficient heat dissipation of the electrolytic cell is achieved, cost reduction and stable operation is ensured.

CN223292657UActive Publication Date: 2025-09-02QINGDAO ZHONGSHI DAXIN ENERGY TECH CO LTD
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Patent Information

Application Number
CN202422708296.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-07
Publication Date
2025-09-02
Estimated Expiration
2034-11-07

AI Technical Summary

Technical Problem

During the electrolysis process of traditional PEM electrolytic cells, about 30% of the electrical energy is lost through heat, resulting in a sharp increase in temperature, increasing cost and operation difficulty, which is not conducive to the development of the hydrogen energy industry.

Method used

A PEM electrolytic cell with heat dissipation function is designed. By setting a heat dissipation runner in the electrode structure on both sides of the membrane electrode, and setting a cooling water inlet and outlet port on the end plate, the circulating flow of cooling water is realized and the heat generated during the electrolysis process is absorbed.

Benefits of technology

It simplifies complex and expensive heat dissipation methods, quickly reduces the temperature of the PEM electrolytic cell, ensures the stable operation and performance of the electrolytic cell, and reduces costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the technical field of PEM electrolytic baths, and particularly relates to a PEM electrolytic bath with a heat dissipation function, which comprises a membrane electrode, two sides of the membrane electrode are respectively provided with an electrode structure, a heat dissipation flow channel is arranged in each electrode structure, one end of each heat dissipation flow channel is communicated with a cooling water inlet, and the other end of each heat dissipation flow channel is communicated with a cooling water outlet. According to the device, cooling water is introduced into the heat dissipation flow channel and is circulated, so that the temperature of the PEM electrolytic bath is rapidly and simply reduced, a traditional complex and expensive heat dissipation mode is simplified, and the PEM temperature is prevented from being too high, so that the stable operation and performance of the PEM electrolytic bath are ensured, and the practicability is good.
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Description

Technical Field

[0001] The utility model belongs to the technical field of PEM electrolyzers, and in particular relates to a PEM electrolyzer with a heat dissipation function. Background Art

[0002] As a clean and efficient energy carrier, hydrogen has a high energy density and produces only water when burned, without producing greenhouse gases and pollutants such as carbon dioxide. Therefore, it is regarded as a vital part of the future energy system. As the core equipment for hydrogen production by water electrolysis, the PEM electrolyzer has become the current mainstream technology due to its excellent start-stop capabilities and high electrical density. However, during the electrolysis process, approximately 30% of the electrical energy is dissipated as heat, which causes the temperature of the PEM electrolyzer to rise sharply. Traditional water electrolysis hydrogen production methods require heat exchange equipment to reduce the temperature of the electrolyzer, which invisibly increases the cost and operational difficulty of PEM water electrolysis hydrogen production, which is not conducive to the development of the hydrogen energy industry. Utility Model Content

[0003] The purpose of the utility model is to provide a PEM electrolyzer with heat dissipation function to solve the above problems.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] A PEM electrolyzer with heat dissipation function comprises: a membrane electrode, wherein electrode structures are respectively provided on both sides of the membrane electrode, a heat dissipation channel is provided in the electrode structure, one end of the heat dissipation channel is connected to a cooling water inlet, and the other end of the heat dissipation channel is connected to a cooling water outlet.

[0006] Preferably, the electrode structure includes a gas diffusion layer, the gas diffusion layer is fixed to the side wall of the membrane electrode, the side of the gas diffusion layer away from the membrane electrode is fixed with a sealing portion, a pole plate, an insulating sealing portion and an end plate in sequence, the heat dissipation channel is provided on the inner side of the end plate, and the heat dissipation channel is located between the insulating sealing portion and the end plate;

[0007] The cooling water inlet and the cooling water outlet are arranged between the end plates;

[0008] The end plate is further provided with a water inlet and an oxygen outlet, which penetrate the insulating sealing portion and communicate with the cavity formed by the electrode plate, the sealing portion, the gas diffusion layer and the membrane electrode.

[0009] Preferably, the sealing portion includes a sealing gasket, and the sealing gasket is fixed between the electrode plate and the gas diffusion layer.

[0010] Preferably, the insulating sealing portion includes an insulating sealing gasket, and the insulating sealing gasket is fixed between the end plate and the electrode plate;

[0011] The water inlet and the oxygen outlet pass through the insulating sealing gasket and are in communication with a cavity formed by the electrode plate, the sealing gasket, the gas diffusion layer and the membrane electrode.

[0012] Preferably, an internal water inlet channel is provided in the end plate, the water inlet end of the internal water inlet channel is connected to the water inlet outlet end, and the water outlet end of the internal water inlet channel passes through the insulating sealing gasket and the side wall of the electrode plate and is connected to the cavity formed by the electrode plate, the sealing gasket, the gas diffusion layer and the membrane electrode.

[0013] Preferably, an internal water outlet channel is provided in the end plate, the outlet end of the internal water outlet channel is communicated with the inlet end of the oxygen outlet, and the inlet end of the internal water outlet channel passes through the insulating sealing gasket and the side wall of the electrode plate and is communicated with the cavity formed by the electrode plate, the sealing gasket, the gas diffusion layer and the membrane electrode.

[0014] Preferably, a plurality of bolt holes are provided on the end plate, bolts are provided in the bolt holes, and the end plate, the insulating sealing gasket, the electrode plate, the sealing gasket, the gas diffusion layer and the membrane electrode are fixed by the bolts.

[0015] Preferably, the heat dissipation channel is a matrix heat dissipation channel.

[0016] Preferably, a matrix flow channel is etched on one side of the electrode plate close to the sealing gasket, a positive and negative electrode connection port is provided on the upper end of the electrode plate, and a positioning hole is opened on the side.

[0017] Preferably, the edge of the sealing gasket is flush with the electrode plate, and a positioning hole is opened on the side.

[0018] Preferably, the thickness of the gas diffusion layer is flush with that of the gasket and is embedded in the center of the sealing gasket.

[0019] Preferably, positioning holes are opened on the front and back sides of the membrane electrode, and anode and cathode catalysts are coated on the left and right sides.

[0020] Compared with the prior art, the present invention has the following advantages and technical effects:

[0021] When in use, the electrode structures on both sides of the membrane electrode serve as the positive and negative electrodes of the electrolytic cell respectively. Water is introduced into the cavity formed between the two electrode structures and the membrane electrode, and electrolysis begins. During the electrolysis process, cooling water is input into the heat dissipation channel opened in the electrode structure through the cooling water inlet to absorb the heat generated during the electrolysis process. The cooling water is then discharged through the cooling water outlet to achieve heat dissipation. By passing the cooling water into the heat dissipation channel and circulating the cooling water, the temperature of the PEM electrolyzer can be quickly and simply reduced, simplifying the traditional complex and expensive heat dissipation method, avoiding excessive temperature of the PEM, thereby ensuring the stable operation and performance of the PEM electrolyzer, and having good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work:

[0023] Figure 1 This is a schematic diagram of the structure of the utility model;

[0024] Figure 2 This is the axonometric view of the end plate structure of the utility model;

[0025] Figure 3 This is a rear side view of the end plate structure of the present invention;

[0026] Among them, 1. End plate; 2. Insulating sealing gasket; 3. Polar plate; 4. Sealing gasket; 5. Gas diffusion layer; 6. Membrane electrode; 101. Water inlet; 102. Cooling water inlet; 103. Internal channel of water inlet; 104. Internal channel of water outlet; 105. Heat dissipation channel; 106. Bolt hole; 107. Oxygen outlet; 108. Cooling water outlet. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] Reference Figures 1 to 3The utility model discloses a PEM electrolyzer with heat dissipation function, comprising: a membrane electrode 6, an electrode structure is provided on both sides of the membrane electrode 6, a heat dissipation channel 105 is provided in the electrode structure, one end of the heat dissipation channel 105 is connected to a cooling water inlet 102, and the other end of the heat dissipation channel 105 is connected to a cooling water outlet 108.

[0030] When in use, the electrode structures on both sides of the membrane electrode 6 serve as the positive electrode and negative electrode of the electrolytic cell respectively. Water is introduced into the cavity formed between the two electrode structures and the membrane electrode 6, and electrolysis begins. During the electrolysis process, cooling water is input into the heat dissipation channel 105 opened in the electrode structure through the cooling water inlet 102 to absorb the heat generated during the electrolysis process. The cooling water is then discharged through the cooling water outlet 108 to achieve heat dissipation. By introducing the cooling water into the heat dissipation channel 105 and circulating the cooling water, the temperature of the PEM electrolyzer can be quickly and simply reduced, simplifying the traditional complex and expensive heat dissipation method, avoiding excessive temperature of the PEM, thereby ensuring the stable operation and performance of the PEM electrolyzer, and having good practicality.

[0031] In a further optimized solution, the electrode structure includes a gas diffusion layer 5, which is fixed to the side wall of the membrane electrode 6. The side of the gas diffusion layer 5 away from the membrane electrode 6 is fixed with a sealing portion, a plate 3, an insulating sealing portion and an end plate 1 in sequence. The heat dissipation channel 105 is provided on the inner side of the end plate 1, and the heat dissipation channel 105 is located between the insulating sealing portion and the end plate 1.

[0032] The cooling water inlet 102 and the cooling water outlet 108 are arranged between the end plates 1;

[0033] The end plate 1 is further provided with a water inlet 101 and an oxygen outlet 107 , which penetrate the insulating sealing portion and communicate with the cavity formed by the electrode plate 3 , the sealing portion, the gas diffusion layer 5 and the membrane electrode 6 .

[0034] According to a further optimized solution, the sealing portion includes a sealing gasket 4 , which is fixed between the electrode plate 3 and the gas diffusion layer 5 .

[0035] In a further optimized solution, the insulating sealing portion includes an insulating sealing gasket 2, which is fixed between the end plate 1 and the electrode plate 3;

[0036] The water inlet 101 and the oxygen outlet 107 penetrate the insulating sealing gasket 2 and communicate with the cavity formed by the electrode plate 3, the sealing gasket 4, the gas diffusion layer 5 and the membrane electrode 6.

[0037] A further optimized solution is provided in the end plate 1 with an internal water inlet channel 103, the water inlet end of the internal water inlet channel 103 is connected with the water outlet end of the water inlet 101, and the water outlet end of the internal water inlet channel 103 passes through the insulating sealing gasket 2 and the side wall of the electrode plate 3 and is connected with the cavity formed by the electrode plate 3, the sealing gasket 4, the gas diffusion layer 5 and the membrane electrode 6.

[0038] A further optimized solution is provided in the end plate 1 with an internal water outlet channel 104, the outlet end of the internal water outlet channel 104 is connected to the inlet end of the oxygen outlet 107, and the inlet end of the internal water outlet channel 104 passes through the insulating sealing gasket 2 and the side wall of the electrode plate 3 and is connected to the cavity formed by the electrode plate 3, the sealing gasket 4, the gas diffusion layer 5 and the membrane electrode 6.

[0039] To further optimize the solution, a plurality of bolt holes 106 are provided on the end plate 1 , bolts are provided in the bolt holes 106 , and the end plate 1 , insulating sealing gasket 2 , electrode plate 3 , sealing gasket 4 , gas diffusion layer 5 and membrane electrode 6 are fixed by bolts.

[0040] According to a further optimized solution, the heat dissipation channel 105 is a matrix heat dissipation channel.

[0041] As a further optimization solution, a matrix flow channel is etched on one side of the electrode plate 3 close to the sealing gasket 4 .

[0042] In this device, a gas diffusion layer 5, a sealing gasket 4, a pole plate 3, an insulating sealing gasket 2 and an end plate 1 are sequentially arranged on both sides of the membrane electrode 6. The gas diffusion layer 5, the sealing gasket 4, the pole plate 3, the insulating sealing gasket 2 and the end plate 1 on one side of the membrane electrode 6 serve as an anode, and the gas diffusion layer 5, the sealing gasket 4, the pole plate 3, the insulating sealing gasket 2 and the end plate 1 on the other side serve as a cathode.

[0043] A cathode insulating sealing gasket 2 and an anode insulating sealing gasket 2 are provided between the anode end plate 1 and the anode plate 3, and between the cathode end plate 1 and the cathode plate 3. An anode sealing gasket 4 and a cathode sealing gasket 4 are directly provided on the anode plate 3 and the cathode plate 3. An anode gas diffusion layer 5 and a cathode gas diffusion layer 5 are embedded in the center of the inner side of the anode sealing gasket 4 and the cathode sealing gasket 4. A membrane electrode 6 is provided between the anode gas diffusion layer 5 and the cathode gas diffusion layer 5.

[0044] Furthermore, a water inlet 101 for introducing electrolyzed water and a cooling water inlet 102 for introducing cooling water are engraved on the front side of the end plate 1 , and an oxygen outlet 107 and a cooling water outlet 108 are engraved on the rear side.

[0045] Furthermore, bolt holes 106 are engraved on the outer surface of the end plate, and the various components can be fixed and clamped by bolts (not shown). The surface of the bolts (not shown) should be coated with an insulating layer to avoid contact with the inside of the electrolytic cell and causing safety hazards such as short circuits.

[0046] Furthermore, a heat dissipation channel 105 is engraved on the inner surface of the end plate 1, which removes heat by circulating cooling water to reduce the temperature of the PEM electrolyzer. Preferably, the end plate 1 is made of steel or aluminum with high hardness and good flatness.

[0047] Furthermore, the insulating sealing gasket 2 is a thin sheet of polytetrafluoroethylene material that is resistant to high temperature and acid and alkali.

[0048] Furthermore, the electrode plate 3 is a titanium plate made of acid-resistant material.

[0049] Furthermore, the sealing gasket 4 is made of a high temperature and acid-base resistant polytetrafluoroethylene sheet with a thickness of 0.5-2 mm.

[0050] Furthermore, the size and thickness of the anode gas diffusion layer 5 match the inner frame of the anode sealing gasket 4 . Preferably, the anode gas diffusion layer 5 is made of titanium felt or sintered titanium plate.

[0051] Furthermore, the size and thickness of the cathode gas diffusion layer 5 match the inner frame of the cathode sealing gasket 4 . Preferably, the cathode gas diffusion layer 5 is made of conductive carbon paper, titanium felt or titanium mesh.

[0052] Furthermore, the membrane electrode 6 is a proton exchange membrane with cathode and anode catalysts coated on both sides.

[0053] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0054] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A PEM electrolyzer with heat dissipation function, comprising: A membrane electrode (6), wherein electrode structures are respectively provided on both sides of the membrane electrode (6), and is characterized in that a heat dissipation channel (105) is provided in the electrode structure, one end of the heat dissipation channel (105) is connected to a cooling water inlet (102), and the other end of the heat dissipation channel (105) is connected to a cooling water outlet (108).

2. The PEM electrolyzer with heat dissipation function according to claim 1, characterized in that: The electrode structure comprises a gas diffusion layer (5), the gas diffusion layer (5) being fixed to a side wall of the membrane electrode (6), a sealing portion, a pole plate (3), an insulating sealing portion and an end plate (1) being fixed in sequence on a side of the gas diffusion layer (5) away from the membrane electrode (6), the heat dissipation channel (105) being arranged on an inner side of the end plate (1), and the heat dissipation channel (105) being located between the insulating sealing portion and the end plate (1); The cooling water inlet (102) and the cooling water outlet (108) are arranged between the end plates (1); The end plate (1) is also provided with a water inlet (101) and an oxygen outlet (107), and the water inlet (101) and the oxygen outlet (107) penetrate the insulating sealing portion and communicate with a cavity formed by the electrode plate (3), the sealing portion, the gas diffusion layer (5) and the membrane electrode (6).

3. The PEM electrolyzer with heat dissipation function according to claim 2, characterized in that: The sealing portion comprises a sealing gasket (4), and the sealing gasket (4) is fixed between the electrode plate (3) and the gas diffusion layer (5).

4. The PEM electrolyzer with heat dissipation function according to claim 3, characterized in that: The insulating sealing portion comprises an insulating sealing gasket (2), and the insulating sealing gasket (2) is fixed between the end plate (1) and the pole plate (3); The water inlet (101) and the oxygen outlet (107) penetrate the insulating sealing gasket (2) and communicate with the cavity formed by the electrode plate (3), the sealing gasket (4), the gas diffusion layer (5) and the membrane electrode (6).

5. The PEM electrolyzer with heat dissipation function according to claim 4, characterized in that: An internal water inlet channel (103) is provided in the end plate (1), the water inlet end of the internal water inlet channel (103) is in communication with the water outlet end of the water inlet (101), and the water outlet end of the internal water inlet channel (103) passes through the insulating sealing gasket (2) and the side wall of the electrode plate (3) and is in communication with a cavity formed by the electrode plate (3), the sealing gasket (4), the gas diffusion layer (5) and the membrane electrode (6).

6. The PEM electrolyzer with heat dissipation function according to claim 4, characterized in that: A water outlet internal channel (104) is provided in the end plate (1), the outlet end of the water outlet internal channel (104) is communicated with the inlet end of the oxygen outlet (107), and the inlet end of the water outlet internal channel (104) passes through the insulating sealing gasket (2) and the side wall of the electrode plate (3) and is communicated with the cavity formed by the electrode plate (3), the sealing gasket (4), the gas diffusion layer (5) and the membrane electrode (6).

7. The PEM electrolyzer with heat dissipation function according to claim 4, characterized in that: The end plate (1) is provided with a plurality of bolt holes (106), wherein bolts are provided in the bolt holes (106), and the end plate (1), the insulating sealing gasket (2), the electrode plate (3), the sealing gasket (4), the gas diffusion layer (5) and the membrane electrode (6) are fixed by the bolts.

8. The PEM electrolyzer with heat dissipation function according to claim 1, characterized in that: The heat dissipation channel (105) is a matrix heat dissipation channel.

9. The PEM electrolyzer with heat dissipation function according to claim 3, characterized in that: A matrix flow channel is etched on one side of the electrode plate (3) close to the sealing gasket (4).